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The work done in placing the dielectric...

The work done in placing the dielectric slab inside one of the capacitors as shown in diagram

A

`(CV^(2))/(2)((K-1)/(k+1))`

B

`(CV^(2))/(4)((K-1)/(k+1))`

C

`(CV^(2))/(4)((K+1)/(k-1))`

D

`(CV^(2))/(2)((K+1)/(k-1))`

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The correct Answer is:
B
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